Sayonara is the Japanese word for goodbye, and this clip features Ash Ketchum, the long-running protagonist of the Pokémon anime, delivering it in a sorrowful tone. Short emotional voice lines like this one circulate widely as reaction sounds for farewells, character departures and the end of series or streams. Because the delivery is gentle rather than theatrical, creators reach for it when they want sadness without melodrama, and it has stayed popular as a simple, instantly understood anime goodbye.